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SUMMARY:Severo Ochoa Seminar: The shape of new physics in B-meson decays
DTSTART;VALUE=DATE-TIME:20171218T110000Z
DTEND;VALUE=DATE-TIME:20171218T120000Z
DTSTAMP;VALUE=DATE-TIME:20180319T141214Z
UID:indico-event-3164@cern.ch
DESCRIPTION:\n \nHigh-precision measurements of flavor-transitions are sen
sitive to the virtual effects of particles at energies beyond the reach of
current colliders. In fact\, although no new heavy particles have been id
entified yet in the high-energy frontier\, there are measurements of semil
eptonic B-meson decays which are in tension with the SM predictions and su
ggest the existence of new lepton non-universal interactions. The first ty
pe of anomalies appear in the charged-current b→ c τ ν transitions wh
ich have been measured through the the ratios RD(*) = Γ(B→D(*) τ ν)/
Γ(B→D(*) l ν)\, where l is the muon or the electron. The average of th
e measurements is enhanced with respect to the SM and it would correspond
to the tree-level exchange of a charged particle with mass Λ ~ 1 TeV coup
led selectively to τ leptons. \nThe second type appears in observables of
the rare b→s ll decays\, like the lepton universality ratios RK(*) =
Γ(B→K(*) μ μ) / Γ(B→K(*) e e) which are currently in 4σ tension w
ith the SM\, putatively corresponding to the tree-level exchange of a neut
ral particle with mass Λ ~ 10 TeV. In this talk I will review these decay
s\, discussing the extent to which the SM predictions are understood and t
he type of new physics one would need to explain the data. I will also dis
cuss experimental and theoretical prospects to clarify the nature of thes
e anomalies in the near future.\n\n\n\nhttp://indico.ific.uv.es/indico/con
ferenceDisplay.py?confId=3164
LOCATION:Campus Burjassot Seminari Física Teòrica
URL:http://indico.ific.uv.es/indico/conferenceDisplay.py?confId=3164
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